联合查询
- 情景：祖孙三代 question->answer->vote
question是answer父节点
answer是vote的父节点
- 建索引结构
PUT join_multi_index
{
"mappings": {
"_doc":{
"properties":{
"my_join_field":{
"type":"join",
"relations":{
"question":"answer",
"answer":"vote"
}
}
}
}
}
}
- 查询索引情况
GET join_multi_index
- 插入数据
# 插入question数据
PUT join_multi_index/_doc/1?refresh
{
"text": "This is a question",
"my_join_field": "question"
}
PUT join_multi_index/_doc/2?refresh
{
"text": "This is another question",
"my_join_field": "question"
}
# 添加answer记录
PUT join_multi_index/_doc/3?routing=1&refresh
{
"text": "This is a answer",
"my_join_field": {
"name": "answer",
"parent": "1"
}
}
PUT join_multi_index/_doc/4?routing=2&refresh
{
"text": "This is another answer",
"my_join_field": {
"name": "answer",
"parent": "2"
}
}
# 孙子节点vote记录
PUT join_multi_index/_doc/5?routing=2&refresh
{
"text": "This is a vote",
"my_join_field": {
"name": "vote",
"parent": "4"
}
}
# 由简入繁的查询
GET join_multi_index/_search
{
"query": {
"has_child": {
"type": "answer",
"query": {
"match": {
"text": "This is answer"
}
}
}
}
}
GET join_multi_index/_search
{
"query": {
"has_child": {
"type": "answer",
"query": {
"has_child": {
"type": "vote",
"query": {
"match": {
"text": "This is vote"
}
}
}
}
}
}
}
GET join_multi_index/_search
{
"query": {
"bool": {
"must": [
{
"match": {
"text": "This is question"
}
},
{
"has_child": {
"type": "answer",
"query": {
"match": {
"text": "This is answer"
}
}
}
},
{
"has_child": {
"type": "answer",
"query": {
"has_child": {
"type": "vote",
"query": {
"match": {
"text": "This is vote"
}
}
}
}
}
}
]
}
}
}
多条件联合查询
GET join_multi_index/_search
{
"query": {
"bool": {
"must": [
{
"has_child": {
"type": "answer",
"query": {
"match": {
"text": "This is answer"
}
}
}
},
{
"has_child": {
"type": "answer",
"query": {
"has_child": {
"type": "vote",
"query": {
"match": {
"text": "This is vote"
}
}
}
}
}
}
],
"should": [
{
"match": {
"text": "This is question"
}
}
]
}
}
}
inner_hits的使用
GET join_multi_index/_search
{
"query": {
"has_child": {
"type": "answer",
"query": {
"has_child": {
"type": "vote",
"query": {
"match": {
"text": "This is vote"
}
},
"inner_hits": {}
}
},
"inner_hits": {}
}
}
}
返回值
{
"took" : 5,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"skipped" : 0,
"failed" : 0
},
"hits" : {
"total" : 1,
"max_score" : 1.0,
"hits" : [
{
"_index" : "join_multi_index",
"_type" : "_doc",
"_id" : "2",
"_score" : 1.0,
"_source" : {
"text" : "This is another question",
"my_join_field" : "question"
},
"inner_hits" : {
"answer" : {
"hits" : {
"total" : 1,
"max_score" : 1.0,
"hits" : [
{
"_index" : "join_multi_index",
"_type" : "_doc",
"_id" : "4",
"_score" : 1.0,
"_routing" : "2",
"_source" : {
"text" : "This is another answer",
"my_join_field" : {
"name" : "answer",
"parent" : "2"
}
},
"inner_hits" : {
"vote" : {
"hits" : {
"total" : 1,
"max_score" : 1.2478919,
"hits" : [
{
"_index" : "join_multi_index",
"_type" : "_doc",
"_id" : "5",
"_score" : 1.2478919,
"_routing" : "2",
"_source" : {
"text" : "This is a vote",
"my_join_field" : {
"name" : "vote",
"parent" : "4"
}
}
}
]
}
}
}
}
]
}
}
}
}
]
}
}
最终版整理
# 三层数据question->answer->vote
GET three_tree_index/_search
PUT three_tree_index
{
"mappings": {
"_doc":{
"properties":{
"my_join_field":{
"type":"join",
"relations":{
"question":"answer",
"answer":"vote"
}
}
}
}
}
}
PUT three_tree_index/_doc/1?refresh
{
"text":"This is a question",
"my_join_field":"question"
}
PUT three_tree_index/_doc/2?refresh
{
"text":"This is another question",
"my_join_field":"question"
}
PUT three_tree_index/_doc/3?routing=1&refresh
{
"text":"This is a answer",
"my_join_field":{
"name":"answer",
"parent":"1"
}
}
PUT three_tree_index/_doc/4?routing=2&refresh
{
"text":"This is another answer",
"my_join_field":{
"name":"answer",
"parent":"2"
}
}
PUT three_tree_index/_doc/5?routing=1&refresh
{
"text":"This is a vote",
"my_join_field":{
"name":"vote",
"parent":"3"
}
}
PUT three_tree_index/_doc/6?routing=2&refresh
{
"text":"This is another vote",
"my_join_field":{
"name":"vote",
"parent":"4"
}
}
#-----------------------------------开始查询
GET three_tree_index/_search
{
"query": {
"has_child": {
"type": "answer",
"query": {
"match": {
"text": "This is answer"
}
}
}
}
}
GET three_tree_index/_search
{
"query": {
"bool": {
"should": [
{ "match": { "text": "This is answer" }},
{ "match": { "texts": "This is answer" }}
]
}
}
}
# question->answer->vote
GET three_tree_index/_search
{
"query": {
"bool": {
"should": [
{
"match": {
"text": "this is question"
}
},
{
"match": {
"text": "this is question"
}
},
{
"has_child": {
"type": "answer",
"query": {
"bool": {
"should": [
{
"match": {
"text": "this is answer"
}
},
{
"match": {
"text": "this is answer"
}
}
]
}
}
}
}
],
"must": [
{
"has_child": {
"type": "answer",
"query": {
"has_child": {
"type": "vote",
"query": {
"bool": {
"should": [
{
"term": {
"text": "vote"
}
}
]
}
}
}
}
}
}
]
}
}
}
